100021320318 has 16 divisors (see below), whose sum is σ = 204921729936. Its totient is φ = 32527258560.

The previous prime is 100021320317. The next prime is 100021320391. The reversal of 100021320318 is 813023120001.

It is a super-2 number, since 2×100021320318² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100021320294 and 100021320303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021320317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203295121 + ... + 203295612.

It is an arithmetic number, because the mean of its divisors is an integer number (12807608121).

Almost surely, 2^100021320318 is an apocalyptic number.

100021320318 is an abundant number, since it is smaller than the sum of its proper divisors (104900409618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100021320318 is a wasteful number, since it uses less digits than its factorization.

100021320318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406590779.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 100021320318 its reverse (813023120001), we get a palindrome (913044440319).

The spelling of 100021320318 in words is "one hundred billion, twenty-one million, three hundred twenty thousand, three hundred eighteen".